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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-10 19:55:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-10 19:55:45 -0800 |
| commit | 9399f0c51489ae8c16d6559b82a452fdc1895e91 (patch) | |
| tree | f99c8140dfb98082496ea2d457f9641ca8078daa /crypto | |
| parent | b0f9ca53cbb103e9240a29a974e0b6085e58f9f7 (diff) | |
| download | lwn-9399f0c51489ae8c16d6559b82a452fdc1895e91.tar.gz lwn-9399f0c51489ae8c16d6559b82a452fdc1895e91.zip | |
crypto: fix af_alg_make_sg() conversion to iov_iter
Commit 1d10eb2f156f ("crypto: switch af_alg_make_sg() to iov_iter")
broke af_alg_make_sg() and skcipher_recvmsg() in the process of moving
them to the iov_iter interfaces. The 'npages' calculation in the formar
calculated the number of *bytes* in the pages, and in the latter case
the conversion didn't re-read the value of 'ctx->used' after waiting for
it to become non-zero.
This reverts to the original code for both these cases.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Miller <davem@davemloft.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/af_alg.c | 2 | ||||
| -rw-r--r-- | crypto/algif_skcipher.c | 5 |
2 files changed, 3 insertions, 4 deletions
diff --git a/crypto/af_alg.c b/crypto/af_alg.c index eb78fe8a60c8..3e80d8b8be45 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -348,7 +348,7 @@ int af_alg_make_sg(struct af_alg_sgl *sgl, struct iov_iter *iter, int len) if (n < 0) return n; - npages = PAGE_ALIGN(off + n); + npages = (off + n + PAGE_SIZE - 1) >> PAGE_SHIFT; if (WARN_ON(npages == 0)) return -EINVAL; diff --git a/crypto/algif_skcipher.c b/crypto/algif_skcipher.c index 37110fd68adf..6fc12c3fc4b9 100644 --- a/crypto/algif_skcipher.c +++ b/crypto/algif_skcipher.c @@ -439,14 +439,13 @@ static int skcipher_recvmsg(struct kiocb *unused, struct socket *sock, while (!sg->length) sg++; - used = ctx->used; - if (!used) { + if (!ctx->used) { err = skcipher_wait_for_data(sk, flags); if (err) goto unlock; } - used = min_t(unsigned long, used, iov_iter_count(&msg->msg_iter)); + used = min_t(unsigned long, ctx->used, iov_iter_count(&msg->msg_iter)); used = af_alg_make_sg(&ctx->rsgl, &msg->msg_iter, used); err = used; |